package org.cbioportal.legacy.persistence.util;

import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.*;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;
import org.redisson.api.RKeys;
import org.redisson.api.RedissonClient;
import org.springframework.cache.Cache;
import org.springframework.cache.CacheManager;

@RunWith(MockitoJUnitRunner.class)
public class RedisCacheUtilsTest {

  @InjectMocks private RedisCacheUtils redisCacheUtils;

  @Mock private Cache cache;
  @Mock private RedissonClient redissonClient;
  @Mock private RKeys keys;

  @Mock private CacheManager cacheManager;

  private String cacheName = "1_test_cache";

  @Before
  public void setUp() throws Exception {

    List<String> keysInCache = new ArrayList<>();
    keysInCache.add("1_test_cache:a_study1_a");
    keysInCache.add("1_test_cache:a__a");
    keysInCache.add("2_test_cache:a_study2_a");
    keysInCache.add("2_test_cache:a__a");

    when(cache.getName()).thenReturn(cacheName);
    when(cache.getNativeCache()).thenReturn(redissonClient);
    when(redissonClient.getKeys()).thenReturn(keys);
    when(keys.getKeysStream()).thenReturn(keysInCache.stream());
    when(cacheManager.getCache(eq(cacheName))).thenReturn(cache);
  }

  @Test
  public void evictByPatternAll() {
    redisCacheUtils.evictByPattern(cacheName, ".*");
    verify(cache, times(1)).evict(eq(".*"));
  }

  @Test
  public void getKeysSelectsForCacheName() {
    List<String> keys = redisCacheUtils.getKeys(cacheName);
    // make sure the cache removes keys with a different prefix ("2_test_cache" in this case)
    List<String> expectedKeys = Arrays.asList("1_test_cache:a_study1_a", "1_test_cache:a__a");
    Assert.assertArrayEquals(expectedKeys.toArray(), keys.toArray());
  }
}
